Cryptic crossword clue
Evacuating hotel, pick up everyone in grand display of disapproval 10

The most common and most likely answer to this crossword clue is the 10 letter word CATCALLING

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Buddy explains!

The straight part
We know that "display of disapproval" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case display of disapproval = catcalling.
The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.
This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.

What does CATCALLING mean?

CATCALLING verb
  1. To make such an exclamation.

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